list1 = ['physics', 'chemistry', 1997, 2000]
list2 = [1, 2, 3, 4, 5]
list3 = ["a", "b", "c", "d"]

print(list1[0])
# print(list2[4])
print(list3[0:2])

list3.append("add")
print(list3)

del list3[1]
print(list3)

del list3[3]
print(list3)
print(len(list3))
print(3 in [1, 2, 3, 4])

aList = [123, 'xyz', 'zara', 'abc', 123]

print("Count for 123 :  %s ", aList.count(123))
print("Count for zara : %s ", aList.count('zara'))

aList.count()